Inflation and deflation device for detecting durability of air cushion

Abstract

The utility model is suitable for the technical field of air cushion durability detection, and discloses an air inflation and deflation device for air cushion durability detection, which comprises a controller, an air storage tank and an air pump connected with the air storage tank. The air pump comprises an air pump body, a piston, a driving mechanism, a push rod and an inflation and deflation pipeline. The piston is vertically arranged in the air pump body and divides the interior of the air pump body into a push rod containing cavity and an air containing cavity. The driving mechanism is arranged on the outer side of the air pump body. The push rod is in transmission connection with an output shaft of the driving mechanism, penetrates into the push rod accommodating cavity and is connected with the piston; the inflating and deflating pipeline is communicated with the gas accommodating cavity and is connected with a gas inlet nozzle of the gas cushion; the pressure sensor is arranged on the inflation and deflation pipeline. The outer side of the air pump main body is simultaneously connected with a plurality of inflating and deflating pipelines, and the inflating and deflating pipelines are communicated with the air accommodating cavity formed by separating the piston, so that during detection, a plurality of air cushions or air bags can be inflated and deflated at the same time, and the test efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air cushion durability performance detection, in particular to an air filling and deflation device for air cushion durability performance detection. Background Art

[0002] Medical air cushions are primarily used for bedridden patients and those who maintain a single position for extended periods to prevent local numbness and pressure sores. They are primarily composed of PVC fabric, a suede cover, and a PVC air inlet nozzle. To ensure their durability, medical air cushions undergo frequent inflation and deflation tests before shipment to detect leaks.

[0003] Common inflation and deflation devices include air pumps, valves, air circuit systems, and pressure sensors. For example, Chinese patent publication CN118161718A describes active inflation and deflation of airbags by switching between an air pump and a valve. However, existing inflation and deflation devices are not capable of simultaneously inflating and deflation multiple airbags or air cushions, resulting in low testing efficiency.

[0004] It can be seen that the existing technology still needs to be improved and enhanced. Utility Model Content

[0005] The utility model aims to provide an inflation and deflation device for testing the durability of an air cushion, aiming to solve the problem that the existing inflation and deflation device cannot inflate and deflate multiple air bags or air cushions at the same time, resulting in low testing efficiency.

[0006] In order to achieve the above purpose, the solution provided by the utility model is:

[0007] An air filling and deflation device for testing the durability of an air cushion comprises a controller, an air storage tank, and an air pump connected to the air storage tank; the air pump comprises an air pump body and further comprises:

[0008] A piston is vertically disposed in the air pump body, and the piston divides the interior of the air pump body into a push rod accommodating chamber and a gas accommodating chamber;

[0009] A driving mechanism, the driving mechanism being arranged outside the air pump body;

[0010] A push rod, the push rod being in driving connection with the output shaft of the driving mechanism and the push rod passing through the push rod accommodating chamber and being connected with the piston;

[0011] A plurality of gas charging and discharging pipelines are provided, and the gas charging and discharging pipelines are connected to the gas containing chamber and the air inlet nozzle of the air cushion;

[0012] The pressure sensor is arranged on the gas charging and discharging pipeline, and the pressure sensor is electrically connected to the controller.

[0013] Optionally, the gas charging and discharging pipeline includes:

[0014] Inlet and outlet air pipes, the inlet and outlet air pipes are arranged on the outside of the air pump body and are connected to the gas containing chamber;

[0015] a first air delivery pipe, wherein both ends of the first air delivery pipe are respectively connected to the air inlet and outlet pipes and the air inlet nozzle of the air cushion;

[0016] A one-way valve, the input end and the output end of the one-way valve are simultaneously connected to the inlet and outlet pipes;

[0017] a first electric valve, which is provided on the inlet and outlet air pipes and is located upstream of the input end of the one-way valve;

[0018] An air return pipe, wherein the air inlet and air outlet ends of the air return pipe are both connected to the air inlet and air outlet pipes, the connection between the air inlet end of the air return pipe and the air inlet and air outlet pipes is located downstream of the output end of the one-way valve, and the connection between the air outlet end of the air return pipe and the air inlet and air outlet pipes is located upstream of the input end of the first electric valve;

[0019] The second electric valve is provided on the air return pipe.

[0020] Optionally, the inflation and deflation device for testing the durability of the air cushion further includes:

[0021] The second gas pipe is connected to the gas storage tank and the air pump body respectively, and the second gas pipe is used to transport the gas in the gas storage tank to the gas containing chamber

[0022] A gas flow control valve is provided at the connection end between the second gas delivery pipe and the air pump body, and the gas flow control valve is electrically connected to the controller;

[0023] An air compressor is connected to the air storage tank.

[0024] Optionally, the inflation and deflation device for testing the durability of the air cushion further includes:

[0025] A pressure gauge is provided on the air pump body and is used to detect the gas pressure in the gas containing chamber.

[0026] Optionally, the inflation and deflation device for testing the durability of the air cushion further includes:

[0027] An air cushion placement rack is provided, wherein the air cushion placement rack has a multi-layer air cushion placement platform (71).

[0028] Optionally, the inflation and deflation device for testing the durability of the air cushion further includes an operating table; the controller is disposed on the operating table, and a display component and an alarm are provided on the operating table, and the display component and the alarm are both electrically connected to the controller.

[0029] Optionally, the driving mechanism is a hydraulic cylinder.

[0030] Optionally, the first gas pipe is a gas hose.

[0031] Beneficial effects:

[0032] The utility model provides an inflation and deflation device for testing the durability of air cushions. By simultaneously connecting multiple inflation and deflation pipelines to the outside of an air pump body, and connecting the inflation and deflation pipelines to a gas accommodating chamber formed by separation of a piston, multiple air cushions or air bags can be inflated and deflated simultaneously during testing, thereby improving test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of an inflation and deflation device for testing the durability of an air cushion provided by the utility model.

[0034] Figure 2 yes Figure 1 Enlarged view of part A.

[0035] Figure 3 It is a structural schematic diagram of the air pump.

[0036] Figure 4 It is a structural schematic diagram of the operating table.

[0037] Description of Figure Numbers:

[0038] 1-gas storage tank; 2-air pump; 21-air pump body; 211-push rod accommodating chamber; 212-gas accommodating chamber; 22-piston; 23-driving mechanism; 24-push rod; 25-gas charging and discharging pipeline; 251-inlet and outlet pipelines; 252-first gas supply pipe; 253-one-way valve; 254-first electric valve; 255-return air pipe; 256-second electric valve; 26-pressure sensor; 3-air cushion; 4-second gas supply pipe; 5-gas flow regulating valve; 6-pressure gauge; 7-air cushion placement rack; 71-air cushion placement platform; 8-operating table; 9-display component; 10-alarm. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0042] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0043] See also Figures 1 to 4 The present invention provides an inflation and deflation device for testing the durability of an air cushion 3, comprising a controller, an air tank 1, and an air pump 2. The air pump 2 is connected to the air tank 1 and comprises an air pump body 21, a piston 22, a drive mechanism 23, a push rod 24, an inflation and deflation pipeline 25, and a pressure sensor 26.

[0044] Among them, the air pump 2 main body 21 can be a vertical air pump 2 main body 21. The piston 22 is vertically arranged in the air pump 2 main body 21, and the piston 22 divides the interior of the air pump 2 main body 21 into a push rod accommodating chamber 211 and a gas accommodating chamber 212. The driving mechanism 23 is mounted on the outside of the air pump 2 main body 21, and the output shaft of the driving mechanism 23 is transmission-connected to the push rod 24. The push rod 24 penetrates into the push rod accommodating chamber 211 and is connected to the piston 22. There are multiple charging and discharging air pipes 25, and the charging and discharging air pipes 25 are connected to the gas accommodating chamber 212 and the air inlet nozzle of the air cushion 3. The pressure sensor 26 can be a digital pressure sensor 26, which is arranged on the charging and discharging air pipes 25, and the pressure sensor 26 is electrically connected to the controller.

[0045] Before testing the durability of air cushion 3, a gas charging / discharging pipe 25, which communicates with gas chamber 212 and is filled with high-pressure gas, is connected to the air inlet of air cushion 3 via a pipe joint. During testing, drive mechanism 23 is activated, driving push rod 24, which in turn drives piston 22 within main body 21 of air pump 2, compressing the high-pressure gas in gas chamber 212. When the gas pressure in gas chamber 212 exceeds the ambient pressure, the gas is delivered to air cushion 3 through gas charging / discharging pipe 25, thereby inflating air cushion 3.

[0046] When the air cushion 3 needs to be deflated, the driving mechanism 23 drives the push rod 24 to move in a direction opposite to the direction in which the push rod 24 moves during the inflation operation. As a result, the gas receiving chamber 212 is placed in a negative pressure state, allowing the gas in the air cushion 3 to flow back into the gas receiving chamber 212 through the inflation and deflation pipeline 25. This cycle can achieve multiple inflation and deflation operations on the air cushion 3.

[0047] Since the outside of the air pump 2 main body 21 is connected to multiple inflation and deflation pipelines 25 at the same time, and the inflation and deflation pipelines 25 are connected to the gas accommodating chamber 212 formed by the piston 22, multiple air cushions 3 or air bags can be inflated and deflated at the same time during testing, so that the test efficiency can be improved.

[0048] It is understood that during the inflation and deflation of the air cushion 3, the gas-containing chamber 212 and the push rod-containing chamber 211 constantly change. To reduce wear on the piston 22 and the inner wall of the air pump 2 main body 21, the surface of the piston 22 and the inner wall of the air pump 2 main body 21 can be sprayed with a polyetheretherketone coating. Polyetheretherketone has excellent self-lubricity and wear resistance, which can reduce wear on the piston 22 and the inner wall of the air pump 2 main body 21.

[0049] Specifically, the controller (not shown in the drawings) may include a memory unit and a processor unit. The processor unit is electrically connected to the memory unit, and the memory unit may store program files for controlling the operation of the drive mechanism 23 and the like, and may also store program files for determining whether the air cushion 3 is leaking.

[0050] like Figures 1 to 3 As shown, optionally, each of the gas charging and discharging pipelines 25 includes an inlet and outlet air pipe, a first air delivery pipe 252 , a one-way valve 253 , a first electric valve 254 , a second electric valve 256 and a return air pipe 255 .

[0051] The inlet and outlet pipes are located outside the main body 21 of the air pump 2 and communicate with the gas-containing chamber 212. The inlet and outlet pipes can be made of metal to facilitate the installation of a pressure sensor 26 (which is mounted on the inlet and outlet pipes 251), a one-way valve 253, a first electric valve 254, and a second electric valve 256 via pipe joints. The two ends of the first gas delivery pipe 252 are respectively connected to the inlet and outlet pipes and the gas-containing chamber 212, thereby enabling long-distance gas transportation. This ensures that the air cushion 3 can be inflated and deflated when placed far away from the air pump 2.

[0052] The input and output ends of the one-way valve 253 are connected to both the inlet and outlet pipes. The one-way valve 253 allows gas to be charged into the air cushion 3 only through the inlet and outlet pipes, while preventing the gas within the air cushion 3 from flowing back into the gas-containing chamber 212 through the one-way valve 253. Therefore, even if an air cushion 3 leaks, the gas-containing chamber 212 is isolated from the outside world. Therefore, other air cushions 3 that are not leaking can be inflated because the pressure within the gas-containing chamber 212 is always greater than the outside pressure.

[0053] The first electric valve 254 and the second electric valve 256 are both electrically connected to the controller. The first electric valve 254 is located on the inlet and outlet pipes, upstream of the input end of the one-way valve 253. The inlet and outlet ends of the return pipe 255 are both connected to the inlet and outlet pipes. The connection between the inlet end of the return pipe 255 and the inlet and outlet pipes is located downstream of the output end of the one-way valve 253, while the connection between the outlet end of the return pipe 255 and the inlet and outlet pipes is located upstream of the input end of the first electric valve 254. The second electric valve 256 is located on the return pipe 255. When the air cushion 3 needs to be deflated, the controller controls the first electric valve 254 and the second electric valve 256. The first electric valve 254 is closed and the second electric valve 256 is opened. Therefore, when the gas holding chamber 212 is in a negative pressure state, the gas in the air cushion 3 can flow back into the gas holding chamber 212 via the first gas supply pipe 252, the return pipe 255, and the inlet and outlet pipes.

[0054] The setting of the first electric valve 254 can prevent the gas from flowing back into the air cushion 3 during the deflation operation; during the inflation operation, the second electric valve 256 is in a closed state, and the gas cannot enter the air cushion 3 through the return air pipe 255 and the first air supply pipe 252 in sequence. Therefore, even if the air cushion 3 leaks, the setting of the return air pipe 255 will not cause the gas containing chamber 212 to be connected to the leaking air cushion 3.

[0055] It should be noted that, when the air cushion 3 leaks, the first electric valve 254 and the second electric valve 256 in the air charging and discharging pipeline 25 connected to the leaking air cushion 3 are both in a closed state.

[0056] Optionally, the first air delivery pipe 252 is an air delivery hose. When the durability of the air cushion 3 does not need to be tested, the first air delivery pipe 252 can be directly stored without taking up too much space.

[0057] like Figure 1 As shown, optionally, the inflation and deflation device for testing the durability of the air cushion 3 further includes a second air supply pipe 4, a gas flow regulating valve 5 and an air compressor.

[0058] The second gas pipe 4 is connected to the gas tank 1 and the main body 21 of the air pump 2, respectively, and is used to transport the gas in the gas tank 1 to the gas receiving chamber 212. The air compressor (not shown in the drawings) is connected to the gas tank 1. When the air compressor is in operation, it pressurizes the gas in the gas tank 1 so that the gas can be transported through the second gas pipe 4 to the gas receiving chamber 212 of the main body 21 of the air pump 2.

[0059] The gas flow control valve is located at the connection between the second gas pipe 4 and the main body 21 of the air pump 2 and is electrically connected to the controller. To ensure that the pressure in the gas-holding chamber 212 remains above the ambient atmospheric pressure during inflation, the gas flow control valve is closed during inflation and deflation operations, thereby preventing gas in the gas-holding chamber 212 from leaking into the second gas pipe 4.

[0060] like Figure 1 and Figure 3 As shown, optionally, the inflation and deflation device for testing the durability of the air cushion 3 further includes a pressure gauge 6. The pressure gauge 6 is provided on the main body 21 of the air pump 2 and is used to detect the gas pressure in the gas receiving chamber 212.

[0061] The pressure gauge 6 is electrically connected to the controller and can provide real-time feedback to the controller on the gas pressure within the gas holding chamber 212. The controller can then determine whether the gas pressure within the gas holding chamber 212 meets the test requirements based on the gas pressure value fed back by the pressure gauge 6 (this gas pressure value can be the gas pressure value at the time the deflation operation ends). If the controller determines that the gas pressure within the gas holding chamber 212 does not meet the test requirements, the gas flow control valve can automatically open under the control of the controller to replenish gas into the gas holding chamber 212. Gas replenishment will not be stopped until the pressure gauge 6 detects whether the gas pressure within the gas holding chamber 212 meets the test requirements.

[0062] It is understandable that the air pressure in the gas containing chamber 212 that meets the test requirements needs to be adjusted based on the number of air cushions 3 to be tested. Therefore, before testing the durability of the air cushions 3, the tester can pre-store multiple air pressure values ​​that meet the test requirements in the controller. When testing, the controller can automatically select the air pressure value of the corresponding number pre-stored in the controller as the judgment standard based on the actual number of air cushions 3 tested.

[0063] like Figure 1 As shown, the inflation and deflation device for testing the durability of the air cushion 3 optionally further includes an air cushion 3 placement rack 7. The air cushion 3 placement rack 7 has multiple layers of air cushion 3 placement platforms 71. Each layer of air cushion 3 placement platforms 71 can accommodate multiple air cushions 3, facilitating simultaneous inflation and deflation of multiple air cushions 3 or airbags, thereby improving testing efficiency.

[0064] like Figure 4 As shown, optionally, the inflation and deflation device for testing the durability of the air cushion 3 further includes an operating table 8; the controller is disposed on the operating table 8, and the operating table 8 is provided with a display component 9 and an alarm 10, both of which are electrically connected to the controller. The display component 9 includes a display panel.

[0065] When the controller determines that the air cushion 3 is leaking based on the detection results of the pressure sensor 26, the display assembly 9 can display the serial number of the inflation / discharge pipe 25 connected to the leaking air cushion 3 to the inspector, thereby facilitating the tracking of the leaking air cushion 3. The alarm 10 can be a self-generating alarm 10. When the controller determines that the air cushion 3 is leaking based on the detection results of the pressure sensor 26, the controller activates the alarm 10 to alert the inspector that the air cushion 3 is leaking during the inspection process.

[0066] It can be understood that during detection, when the pressure detection sensor detects that the gas pressure in the inlet and outlet pipes is significantly lower than the gas pressure in other inlet and outlet pipes 251 or is close to atmospheric pressure, it can be determined that the air cushion 3 connected to the corresponding inlet and outlet pipes (inflating and discharging pipes 25) has a leak.

[0067] like Figure 3 As shown, optionally, the driving mechanism 23 is a hydraulic cylinder, and the push rod 24 is a movable telescopic rod, the telescopic stroke of which can be adjusted based on the inflation and deflation requirements of the air cushion 3 to ensure that the inflation operation of the air cushion 3 can be achieved.

[0068] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An air filling and deflation device for testing the durability of an air cushion, comprising a controller, an air storage tank (1), and an air pump (2) connected to the air storage tank (1); characterized in that: The air pump (2) comprises an air pump body (21), and further comprises: A piston (22), wherein the piston (22) is vertically arranged in the air pump body (21), and the piston (22) divides the interior of the air pump body (21) into a push rod accommodating chamber (211) and a gas accommodating chamber (212); A driving mechanism (23), wherein the driving mechanism (23) is arranged outside the air pump body (21); A push rod (24), the push rod (24) is drivingly connected to the output shaft of the driving mechanism (23), and the push rod (24) penetrates into the push rod accommodating cavity (211) and is connected to the piston (22); A plurality of gas charging and discharging pipelines (25) are provided, and the gas charging and discharging pipelines (25) are in communication with the gas containing chamber (212) and connected to the air inlet nozzle of the air cushion (3); A pressure sensor (26) is provided on the gas charging and discharging pipeline (25), and the pressure sensor (26) is electrically connected to the controller.

2. The inflation and deflation device for testing the durability of an air cushion according to claim 1, characterized in that: The gas charging and discharging pipeline (25) comprises: an air inlet and outlet pipe (251), the air inlet and outlet pipe (251) being arranged outside the air pump body (21), and the air inlet and outlet pipe (251) being in communication with the gas containing chamber (212); a first air delivery pipe (252), wherein both ends of the first air delivery pipe (252) are respectively connected to the air inlet and outlet pipes (251) and the air inlet nozzle of the air cushion (3); A one-way valve (253), wherein the input end and the output end of the one-way valve (253) are simultaneously connected to the inlet and outlet air pipes (251); A first electric valve (254), the first electric valve (254) is provided on the air inlet and outlet pipes (251) and is located upstream of the input end of the one-way valve (253); An air return pipe (255), wherein both the air inlet and air outlet ends of the air return pipe (255) are connected to the air inlet and air outlet pipes (251), the connection between the air inlet end of the air return pipe (255) and the air inlet and air outlet pipes (251) is located downstream of the output end of the one-way valve (253), and the connection between the air outlet end of the air return pipe (255) and the air inlet and air outlet pipes (251) is located upstream of the input end of the first electric valve (254); A second electric valve (256), the second electric valve (256) is provided on the air return pipe (255).

3. The inflation and deflation device for testing the durability of an air cushion according to claim 2, characterized in that: Also includes: A second gas delivery pipe (4), the second gas delivery pipe (4) being connected to the gas storage tank (1) and the gas pump body (21) respectively, and the second gas delivery pipe (4) being used to deliver the gas in the gas storage tank (1) to the gas containing chamber (212) A gas flow control valve (5), the gas flow control valve (5) being provided at the connection end between the second gas delivery pipe (4) and the air pump body (21), and the gas flow control valve (5) being electrically connected to the controller; An air compressor is connected to the air storage tank (1).

4. The inflation and deflation device for testing the durability of an air cushion according to claim 3, characterized in that: Also includes: A pressure gauge (6) is provided on the air pump body (21) and is used to detect the gas pressure in the gas containing chamber (212).

5. The inflation and deflation device for testing the durability of an air cushion according to claim 1, characterized in that: Also includes: An air cushion placement rack (7) is provided, wherein the air cushion placement rack (7) has a multi-layer air cushion placement platform (71).

6. The inflation and deflation device for testing the durability of an air cushion according to claim 1, characterized in that: The device also includes an operating table (8); the controller is arranged on the operating table (8); a display component (9) and an alarm (10) are arranged on the operating table (8); and both the display component (9) and the alarm (10) are electrically connected to the controller.

7. The inflation and deflation device for testing the durability of an air cushion according to claim 1, characterized in that: The driving mechanism (23) is a hydraulic cylinder.

8. The inflation and deflation device for testing the durability of an air cushion according to claim 2, characterized in that: The first gas delivery pipe (252) is a gas delivery hose.

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